382 MESSRS. ROBINSON AND KLOSS ON 



have it from Penang, from Trong on the coast of Perak, and 

 Temengoh in the north of that State. 



It is quite a different bird from A. malaccensifi, from which 

 it can at once be distinguished by its darker olive green belly in 

 both sexes and by the maroon red ear-coverts and wing-coverts of 

 the male. There is no difference in size. 



552. Arachnothera robusta Mull. & Schleg. 



Arachnothera robusta, Miillev it Schlegel, Verh. Nat. Ges. Ned. lud., 

 Land-en Volkenk, 1843, p. 68, pi. 2, fig. 1 (W. Sumatra) ; F,, 

 p. 78 (Trang). 



4 d. Chong, Trang, P. Siam, 4-17 Dec. 3 911. 



This spider-hunter was quite common at Chong, but has not 

 been observed elsewhere in Siara, these birds being the most north- 

 erly on record. 



All are fully a'dult, the orange pectoral tufts strongly devel- 

 oped, and measure wing 84-90, bill 52-54 mm., against wing 88-93, 

 bill 57-60.5 mm. in three similarly adult males from Selangor and 

 Western Pahang. These latter dimensions are larger than recorded 

 for Sumatran or Bornean birds, but we can detect no differences in, 

 colour and consider that it is intrinsically improbable that the Suma- 

 tran, Bornean and northern Malayan birds are identical, while the 

 southern Malayan ones differ. 



The Javan bird, Arachnothera robusta armata Mlill. Sz 

 Schleg. (= Arachnothera uropygialis, G, R. Gr.) is very markedly 

 smaller and greyer on the throat (vide Hartert, Nov. Zool. viii, 1901, 

 p. 52). We still doubt if this bird is really found in Sumatra ; but 

 if so it Avill have to stand as a distinct species. 



553. Arachnothera longirostra (Lath.). 



Certhia longirostra, Latham, Ind. Ornith. i, 1790, p. 299 (Sylhet). 

 Arachnothera jmsilla, Blytb, Cat. Birds. Mns. Asiat. Soc. Bengal, 



1849, p. 328 (Arracan). 

 Arachnothera longirostra, A., pp. 174, 507 (Tavoy to Bankasoon) ; 



B., p. 25 (Junk Seylon) ; 0. i, p. 330 (Tenasserim) ; E., p. 72 



(Patani) ; F., p. 77 (Trang) ; H., p. 109 (Bandon) ; L., p. 119 



(Ghirbi). 



A. Hume i- Davison, Stray Feathers, vi, 1878. E. O. Grant, Fasciculi Malayenses, iii (Birds), 1905. 



B. Miiller, Die Ornis der Insel SalanKa, 1882. F. Eobinson and Kloss. 11ns, 1910-11. 



C. Oatos, Birds Brit. Burmah, Vols. i. &ii, 1883. C. Gairdner, .lourn. N.H. Soc. Siam, i, 1915. 



D. Bonhoto, P. Z.S. 1901, Vol. i. H. Robinson, Journ. F. M. S. Museums, v, 1915. 



JOURN. NAT. HIST. SOC. SIAM. 



